How do you replace the wiper relay for the rear wiper for a fiat 55s?

To replace the rear wiper relay on a Fiat 55S, first locate the relay in the fuse box, which is usually found under the dashboard or in the engine compartment. Disconnect the battery to ensure safety, then remove the old relay by gently pulling it out of its socket. Insert the new relay in the same position, reconnect the battery, and test the rear wiper to ensure it's functioning properly. If the wiper still doesn't work, check the wiring and fuses for any additional issues.